ซึ่งในตรงนี้ J Gleck ผู้แต่งหนังสือ Genius : The Life and Science of Richard Feynman (New York, 1992) ได้กล่าวของ Richard Feynman ไว้ว่า
This was Richard Feynman nearing the crest of his powers. At twenty-three ... there was no physicist on earth who could match his exuberant command over the native materials of theoretical science. It was not just a facility at mathematics (though it had become clear ... that the mathematical machinery emerging from the Wheeler-Feynman collaboration was beyond Wheeler's own ability).
Feynman seemed to possess a frightening ease with the substance behind the equations, like Einstein at the same age, like the Soviet physicist Lev Landau - but few others.